MESH Group

Prism ICT Labs Lessons

Computer Networks - Part 2 Computer Networks and Networking Devices.

Meeting is 2moro Sunday 5th at Garden City. Plz come and attend

Meeting is tomorrow Sun 5th at Garden City,

Who be there!!!!!!!

What famous inventor or scientist has the same September birthday as you?

September 1

1856 - Sergei Winogradsky noted Russian scientist

September 2

1850 - Woldemar Voigt noted German physicist
1853 - Wilhelm Ostwald, German physical chemist who won the Nobel prize in 1909
1877 - Frederick Soddy, British chemist who won the Nobel prize
1936 - Andrew Grove was an American computer chip manufacturer

September 3

1875 - Ferdinand Porsche was a German car inventor who designed the Porsche and Volkswagen cars
1905 - Carl David Anderson was an American physicist who won the 1936 Nobel Prize for physics
1938 - Ryoji Noyori was Japanese chemist and a Nobel Prize winner

September 4

1848 - Lewis H Latimer was an American inventor who drafted the patent drawings for Alexander Graham Bell's patent application for the telephone, worked for Thomas Edison, and invented an electric lamp.
1904 - Julian Hill was a noted chemist
1913 - Stanford Moore was an American biochemist who won the Nobel prize in 1977
1934 - Clive Granger was a Welsh economist and Nobel prize winner

September 5

1787 - François Sulpice Beudant was a French geologist

September 6

1732 - Johan Wilcke was a noted Swedish physicist
1766 - John Dalton was a British physicist who developed the atomic theory of matter
1876 - John Macleod was Canadian physiologist who won the Nobel prize in 1923
1892 - Edward V Appleton was a noted British physicist
1939 - Susumu Tonegawa was a Japanese molecular biologist who won the Nobel Prize
1943 - Richard Roberts was a British biochemist who won a Nobel Prize

September 6

1732 - Johan Wilcke was a noted Swedish physicist
1766 - John Dalton was a British physicist who developed the atomic theory of matter
1876 - John Macleod was Canadian physiologist who won the Nobel prize in 1923
1892 - Edward V Appleton was a noted British physicist
1939 - Susumu Tonegawa was a Japanese molecular biologist who won the Nobel Prize
1943 - Richard Roberts was a British biochemist who won a Nobel Prize

Next time we shall look at the second week of September.

Famous Scientists
1. Albert Einstein (1879-1955)
2. Stephen Hawking, 72
3. Benjamin Franklin (1706-1790)
4. Sir Isaac Newton (1642-1727)
4. Thomas Edison (1847-1931)
5. Nikola Tesla (1856-1943)
6. Alexander Graham Bell (1847-1922)
7. Charles Darwin (1809-1882)
8. Galileo Galilei (1564-1642)
9. George Washington Carver (1864-1943)
10. Florence Nightingale (1820-1910) 11

Find out who invented what and post accordingly.....

CNN reports on Uganda Innovation Lab - video CNN describes the Uganda Innovation Lab as the place "where great minds and unusual materials combine". The CNN video shows what the Lab does in order to provide new tools for Ugandan children to a...

Question:

Have you ever looked into the sky, seen an airplane, helicopter or glider and wondered how is that possible? I know that metal is more dense than air, so how is it possible that something can fly? Basically it is all a question of force balance. If the upward force is greater than the gravitational force imposed on an object, the object will go up. If the gravitational force is greater, then the object will go down or remain on the ground. As with all things in nature, balance of force is a key component in just about every process. In flight there are 4 basic components:

Thrust
Drag
Lift
Weight

Newton’s First Law

“Every body remains in a state of rest or uniform motion unless it is acted upon by an external unbalanced force.”

If the thrust equals drag there is no change in the horizontal motion. If lift equals weight there is no change in the vertical motion. If any of these is increased or decrease so that the formula is unbalanced, a change will occur.


Newton’s Second Law

“A body of mass (m) subject to a force (F) undergoes an acceleration (a).”
F=m ×a

This law defines the amount of force, produced by lift, needed to overcome the effects of gravity. This lift is achieved in part by use of the Bernoulli principle, and also Newton’s Third Law of motion.

The Bernoulli Principle

The Bernoulli Principle simply states that an increase of a flow results in a decrease of pressure. When air hits the leading edge (rounded edge) of the airfoil as pictured above, the airflow above the wing travels faster than the flow below the wing. As the Bernoulli Principle states, the pressure below the wing will be higher than the air pressure above the wing. Because of this difference in pressure, lift is created. This lift pushes the wings upward. However this is not the only physics principle at work.


Newton’s Third Law of Motion

“For every action there is an equal and opposite reaction.”

It can be seen in the picture to the right that as the angle of attack is increased, as in the bottom picture, the resultant force from the deflection of the air both above and below the wing is also a major component to lift. As the air is deflected downward, as in the top picture, it pushes on the wing in an equal and opposite direction. Newton’s Third Law in conjunction with Bernoulli’s principle can be used to explain the physics behind lift that allows an airplane to fly. Lift combined with drag, weight, and thrust; provide the 4 forces which need to be controlled to allow an airplane to maintain flight.

We are all stakeholders of Science and Technology Popularisation.... Everyone has a role to play

The annual Mesh Group Inter School Science Challenge - Coming soon..... Has your school signed up?

In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. - Galileo Galilei

uneb released uace yesterday bt sciences are still poorly performed. what do u think should be done to cub this terrible trend...

UCC had resolved that they would put off fake mobile phones from the network by June but it looks like there are still a lot of them out there. Just in a period of one month, I have met over four people carrying fake phones without any idea about their state. The one of my concern was one person who was confidently carrying a big green phone claiming right along with the markings on top that it was SAMSUNG galaxy S4. He had actually put in lots of money to purchase it only to find that it could not receive any signal even where RSSI values would be highest. More may follow him. Join Moses Egwanyu as he looks into the ins and outs of fake phones on the “Science talk” this Monday 28th Oct. 2013 on Delta Radio 97.0 FM from 5:00 – 6:00 pm.